One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,13)(14,16)(17,18,24,30)(19,25,33,26)(20,34,32,42)(21,36,40,45)(22,28,23,29)(27,39,46,38)(31,47,48,44)(35,41,37,43)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,24,33)(18,25,30,26)(20,22,32,23)(21,37,40,35)(27,44,46,47)(28,42,29,34)(31,38,48,39)(36,43,45,41)(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,20,23,19,24,32,22,33)(18,26,28,42,30,25,29,34)(21,35,39,31,40,37,38,48)(27,43,45,47,46,41,36,44)(9,11,12,16)(10,14,13,15)(17,21,23,39,24,40,22,38)(18,27,28,45,30,46,29,36)(19,31,32,37,33,48,20,35)(25,41,34,44,26,43,42,47)(2,5)(6,8)(17,22,24,23)(18,28,30,29)(19,32,33,20)(21,38,40,39)(25,42,26,34)(27,45,46,36)(31,37,48,35)(41,47,43,44)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.